Commentary for Kiddushin 132:13

This is a rare case in which the amoraim make a midrash on the way a letter is written. The letter vav in the world “shalom” is broken in half (look in a tikkun and you will see). This allows us to read it as if the word says “shalem” and not “shalom.” The verse can now be read as if it says that the descendants of Aaron are given the covenant only if they are “whole” meaning not blemished. If they are blemished, all of their earlier sacrifices are rendered invalid.